Global Patent Index - EP 0075480 A3

EP 0075480 A3 19830907 - SERIAL DATA COMMUNICATION SYSTEM

Title (en)

SERIAL DATA COMMUNICATION SYSTEM

Publication

EP 0075480 A3 19830907 (EN)

Application

EP 82304952 A 19820921

Priority

US 30475681 A 19810923

Abstract (en)

[origin: EP0075480A2] A serial data communication system comprises digital send/receive logic 103 and analog send/receive circuitry 104. Data is transmitted over a bus 105, encoded as no pulse for a ONE, alternate positive and negative pulses for successive ZERO's. For transmitting, circuitry 103 includes a timing flip-flop which produces a <3>/<4>-bit-period STROBE signal for each ZERO, and a toggle flip-flop for pulse polarity. For receiving, incoming positive and negative pulses drive separate digital differentiators. A synchronizing counter is controlled to include an extra <<tick>> or omit a tick from a normal 16-tick bit period appropriately. A further counter detects a string of at elast 8 ONE's, representing the end of transmission, the data being pre-coded to ensure that such a string of ONE's cannot occur in true transmission of information.

IPC 1-7

H04L 25/49

IPC 8 full level

G06F 13/00 (2006.01); H03M 5/04 (2006.01); H04L 1/00 (2006.01); H04L 7/033 (2006.01); H04L 25/40 (2006.01); H04L 25/49 (2006.01); H04L 29/10 (2006.01)

CPC (source: EP KR)

G06F 3/00 (2013.01 - KR); H04L 1/0083 (2013.01 - EP); H04L 7/0331 (2013.01 - EP); H04L 25/4925 (2013.01 - EP)

Citation (search report)

  • [A] US 3787613 A 19740122 - FARMER W, et al
  • [A] US 4243976 A 19810106 - WARNER RICHARD C, et al
  • [A] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 19, no. 11, April 1977, page 4223, New York, USA; R. VAUTIER: "Cassette data format".
  • [A] IEEE TRANSACTIONS ON COMMUNICATIONS, vol. COM-20, no. 6, December 1972, pages 1198-1200, IEEE, New York, USA; J.W. MARK et al.: "A bipolar signal waveform generator".
  • [A] WESTERN ELECTRIC, TECHNICAL DIGEST, no. 39, July 1975, pages 31-32, New York, USA; A.J. RICH: "Bipolar to unipolar signal converter".

Designated contracting state (EPC)

DE FR GB IT SE

DOCDB simple family (publication)

EP 0075480 A2 19830330; EP 0075480 A3 19830907; AU 8809282 A 19830331; JP S5863253 A 19830415; KR 840001725 A 19840516; YU 211382 A 19850320

DOCDB simple family (application)

EP 82304952 A 19820921; AU 8809282 A 19820907; JP 16328182 A 19820921; KR 820004298 A 19820923; YU 211382 A 19820923